Can't boot current under bhyve on current

[Sean Eric Fagan]

>I think vm-bhyve hides stderr output from bhyve by default, but there might
>be a flag to make it display the stderr output.  Can you try doing that to see
>if bhyve is reporting an error?  Alternatively, can you see if the bhyve
>process is still running?

The log file from it is below.  bhyve was still running, looping on vm ioctls,
until I killed it.

	starting bhyve (run 1)
	bhyve exited with status 1
	destroying network device tap1
	stopped
	initialising
	 [loader: bhyveload]
	 [cpu: 1]
	 [memory: 512M]
	 [hostbridge: standard]
	 [com ports: com1]
	 [uuid: ad7532de-bec1-11e9-8a55-d05099c38c95]
	 [utctime: yes]
	 [debug mode: no]
	 [primary disk: disk0.img]
	 [primary disk dev: file]
	initialising network device tap0
	failed to find virtual switch 'public'
	booting
	bhyveload -m 512M -e autoboot_delay=3 -d /VMs/VM-TEST/../.iso/FreeBSD-13.0-CURRENT-amd64-20190725-r350322-disc1.iso VM-TEST
	 [bhyve options: -c 1 -m 512M -AHP -U
ad7532de-bec1-11e9-8a55-d05099c38c95 -u]
	 [bhyve devices: -s 0,hostbridge -s 31,lpc -s
4:0,virtio-blk,/VMs/VM-TEST/disk0.img -s
5:0,virtio-net,tap0,mac=58:9c:fc:04:34:69]
	 [bhyve console: -l com1,stdio]
	 [bhyve iso device: -s
3:0,ahci-cd,/VMs/VM-TEST/../.iso/FreeBSD-13.0-CURRENT-amd64-20190725-r350322-disc1.iso,ro]
	starting bhyve (run 1)
	bhyve exited with status 1
	destroying network device tap0
	stopped

Alan was trying to help me debug this yesterday, and I manually ran bhyve, but
had no errors, and it still didn't work.

Thanks,

Sean.